521530894 has 16 divisors (see below), whose sum is σ = 799875648. Its totient is φ = 254918752.

The previous prime is 521530859. The next prime is 521530901. The reversal of 521530894 is 498035125.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92484 + ... + 97960.

It is an arithmetic number, because the mean of its divisors is an integer number (49992228).

Almost surely, 2^521530894 is an apocalyptic number.

521530894 is a deficient number, since it is larger than the sum of its proper divisors (278344754).

521530894 is a wasteful number, since it uses less digits than its factorization.

521530894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6539.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 521530894 is about 22837.0509041776. The cubic root of 521530894 is about 804.9335202228.

The spelling of 521530894 in words is "five hundred twenty-one million, five hundred thirty thousand, eight hundred ninety-four".